docstr: Locates the repository's root path from a subdirectory. 
docstr_tok: ["Locates","the","repository","'s","root","path","from","a","subdirectory","."]
code: def repository_root(self, git_dir=None, **kwargs):
      """Locates the repository's root path from a subdirectory."""
      stdout = self.rev_parse(
          "--show-toplevel", git_dir=git_dir, **kwargs
      )
      return stdout.decode("utf-8")
  
file_path: arrow/dev/archery/archery/utils/git.py
imports: from .command import Command, capture_stdout, default_bin
  from ..compat import _stringify_path
label_desc: Use image node_id 14 for calling the Git obj's underlying member method code with example usage: obj.repository_root(git_dir) and returns: stdout